Ladies & Gentlemen:
I have the following configuration:
Micrologix 1200 Rev C 1762-LW40BWA processor with one 1762-IF2OF2 analog i/o card
I have hooked the hardware up per the installation manuals, i.e. the ribbon cable is attached between the processor and the i/o card.
I have brought up a new project in RSLogix 500, configured the processor, added the i/o card by reading the i/o config.
I have set the ADV Config. such that all i/o are 4-20 ma & Raw.
Ensured that the internal dip switches on the analog card are in the 4-20 ma position.
Supplied a known input to In0 (+) and In0 (-).
(I have a meter across the inputs so I can see the signal is present.)
I have cycled the power to the processor repeatedly.
The problem is that when I go into RSLogix500 and examine the input values (I can see that the Input and Output words are displayed in the O and I datafiles) but there doesn't appear to be any value in the input bits for the input (i.e. all the input bits are zero) not a binary pattern for the value converted from the input signal.
The Input data bits are as follows:
Data Word 0 thru 4 are all zero for the module.
Data Word 4 Bit 5,6,1 and 0 are ones for the module.
Data Word 5 Bits 15,13,7 and 5 are ones for the module.
All other Bits are currently zero in words 4 & 5 for the module.
This seems to indicate that the current is below the threshold for the inputs and outputs regardless of the value on the meter input.
I have modulated the ma signal in from 2.3 ma to 8.5 ma and the inputs do not change.
Additionally:
1762-IF2OF2 <----> Raytek I/R Pyrometer
IN0 (+) -------------MA (+)
IN0 (-) -------------MA (-)
I have not worked with this combination of hardware before, and have searched thru all of the available on-line manuals, but appear to have missed some critical step. Is there some bits that need to be "turned on" so that the processor will use the module (i.e. an "enable")?
Is there a setting in the IOS function file that needs to be set or what??
I would appreciate any help or insights that could be provided.
Thank you for your time and input.
David Gay
I have the following configuration:
Micrologix 1200 Rev C 1762-LW40BWA processor with one 1762-IF2OF2 analog i/o card
I have hooked the hardware up per the installation manuals, i.e. the ribbon cable is attached between the processor and the i/o card.
I have brought up a new project in RSLogix 500, configured the processor, added the i/o card by reading the i/o config.
I have set the ADV Config. such that all i/o are 4-20 ma & Raw.
Ensured that the internal dip switches on the analog card are in the 4-20 ma position.
Supplied a known input to In0 (+) and In0 (-).
(I have a meter across the inputs so I can see the signal is present.)
I have cycled the power to the processor repeatedly.
The problem is that when I go into RSLogix500 and examine the input values (I can see that the Input and Output words are displayed in the O and I datafiles) but there doesn't appear to be any value in the input bits for the input (i.e. all the input bits are zero) not a binary pattern for the value converted from the input signal.
The Input data bits are as follows:
Data Word 0 thru 4 are all zero for the module.
Data Word 4 Bit 5,6,1 and 0 are ones for the module.
Data Word 5 Bits 15,13,7 and 5 are ones for the module.
All other Bits are currently zero in words 4 & 5 for the module.
This seems to indicate that the current is below the threshold for the inputs and outputs regardless of the value on the meter input.
I have modulated the ma signal in from 2.3 ma to 8.5 ma and the inputs do not change.
Additionally:
1762-IF2OF2 <----> Raytek I/R Pyrometer
IN0 (+) -------------MA (+)
IN0 (-) -------------MA (-)
I have not worked with this combination of hardware before, and have searched thru all of the available on-line manuals, but appear to have missed some critical step. Is there some bits that need to be "turned on" so that the processor will use the module (i.e. an "enable")?
Is there a setting in the IOS function file that needs to be set or what??
I would appreciate any help or insights that could be provided.
Thank you for your time and input.
David Gay